4520839 has 4 divisors (see below), whose sum is σ = 4676760. Its totient is φ = 4364920.

The previous prime is 4520807. The next prime is 4520843. The reversal of 4520839 is 9380254.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4520839 - 2⁵ = 4520807 is a prime.

It is a Duffinian number.

4520839 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4520839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4520849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77917 + ... + 77974.

It is an arithmetic number, because the mean of its divisors is an integer number (1169190).

Almost surely, 2^4520839 is an apocalyptic number.

4520839 is a deficient number, since it is larger than the sum of its proper divisors (155921).

4520839 is a wasteful number, since it uses less digits than its factorization.

4520839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155920.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 4520839 is about 2126.2264695935. The cubic root of 4520839 is about 165.3508177001.

The spelling of 4520839 in words is "four million, five hundred twenty thousand, eight hundred thirty-nine".